Improvement in acid-pumps



'INVENTOR.

a I 4 H I I Fig.1.

UNI ED" STATES PATENT FFIGE.

LUGIUS H. FISHER, or on. (new, PENNSYLVANIA.

IMPROVEMENT IN ACID-PUMPS.

To all whom it may concern:

.Beitknown that I, L.H.F1s1-1ER, of Oil City, in the county of Venangoand State of Pennsylvania, have invented a new and valuable Improvementin Acid-Pumps; and I do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawing making a part of thisspecification, and to the letters and figures of reference markedthereon.

Figure 1 of the drawing is a representation of a vertical section of myinvention.

My invention has relation to pumps designed for use in drawing sulphuricacid; and the novelty consists in the use of leaden ball valves, and inthe construction of the pumpbarrel, tube, and piston, all as hereinaftermore fully described.

Referring to the drawing, A represents the pump-barrel and B the tube,both made of glass, and screwed together. The barrel is conical orfunnel-shaped at the upper part, so that it may contain sufficient fluidto prevent splashing or leakage from the top. 0 designates the tube fromwhich the acid pours when drawn up. D represents the piston, having aconical or flanged screw-cup, a, fitted to its head and encircled by arubber ring, a, to produce suction. A hole is bored through said cap forthe passage of acid. Above the cup is a recess containing aballof lead,0, which acts as a valve for the piston. E designates another ball oflead placed in the upper part of the tube B, the bore of which isenlarged to produce a socket, z, and made with a concave seat at b. Theball E is also a valve, and is raised by suction, but drops by its ownweight. Lead is used for the valves because it possesses sufficientspecific gravity to render its action certain in the heaviest acids, andbecause that metal is not afi'ected by the acid. Two bars of glass, 61,placed across the top of the tube B prevent the valve E from being drawnup too far. F represents slots in the side of the piston tolet the acidpass through. In the lip-stroke of the piston. the valve E rises, andthe valve 0 lowers or closes. Air is exhausted out of the barrel, andthe acid rises to fill the vacuum. In the downstroke the The acid thenruns through the piston, and is with the next up-stroke ejected from thepump.

the barrel.

I claim- The acid-pump herein described, consisting of the glass barrelA, glass tube B, the piston D containing the lead-ball valve 0, cup a,and packing a, the socket z, lead-ball valve E, and guard 61, allarranged substantially as specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

LUOIUS HARRISON FISHER.

Witnesses:

J. M. BROTHERS, A. B. ARMUS.

lower valve is closed and the upper one raised.

G represents a cap which fits on the top of the pump, but which may bemade solid with v

